Champignon Witch

Story

Deep within the depths of a murky forest resides a quite peculiar dark witch. Dwelling in an abode created by poisonous mushrooms, leaving toxic fungi in her wake and even exhaling noxious spores with every breath she takes, Luna lives a rather solitary existence. Believing her future would continue in the same vein for the rest of eternity, she is shocked to her core by a sudden dreamlike encounter…

Synopsis via AniList (English).